When zanz adds cards there's often a period where we playtest for him, and he subsequently tweaks it. Having that card in War during the test phase isn't really fair to some teams, so they're usually just banned from pvp events (especially War) until they're more established. Given that the change occurred a couple days before bidding started, I'd say they'd fall in the unestablished camp.
Not to mention everyone would have to resubmit apps in the new format at best, and at worst we'd have to find some new Generals.
I'm definitely gonna have to get off my butt and grind before next Trials and War, though...